Exoplanets

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Across
  1. 2. Planet with ruby and sapphire clouds
  2. 4. Planet where rocks rain from the sky
  3. 5. The frozen world colder than Pluto
  4. 7. Rocky planet larger than Earth
  5. 9. When one side always faces its star
  6. 12. Known as "The Genesis Planet" or "Methuselah"
  7. 13. The planet that exists in the "forbidden" zone
  8. 14. Planet that orbits four different suns
  9. 15. Planet with sideways glass rain and deep blue color
  10. 16. First confirmed planet to orbit two stars
  11. 18. Darkest known planet in the universe
Down
  1. 1. Planet that might be made of diamonds
  2. 3. How some planets are discovered using gravity
  3. 6. Planet with glowing water vapor and metal rain
  4. 8. Large gas giant close to its star
  5. 10. Type of planet that orbits two stars
  6. 11. Planet being eaten by its star, shaped like an egg
  7. 15. Planet with eternal light from three suns
  8. 17. Planet as fluffy as cotton candy